ByDr. Brennan Commerford, Chiropractic Physician·Last reviewed: April 2026
All Ingredients
Mineral1 form

Magnesium (as Magnesium L-Threonate)

Evidence Level
Moderate Evidence

Quick Answer

What is the best form of Magnesium (as Magnesium L-Threonate)?

We compared 1 forms of Magnesium (as Magnesium L-Threonate) in our formulary. Browse the comparison table below to find the best form for your goals.

1forms compared

All Forms of Magnesium (as Magnesium L-Threonate)

FormTierBioavailabilityDose RangeUnit
Magnesium L-ThreonateT2 SpecialistS2

Bioavailability by Form

S2 — Good
Magnesium L-Threonate

What is Magnesium (as Magnesium L-Threonate)?

Magnesium (as Magnesium L-Threonate) is a Mineral supplement available in 1 form.

Not all forms of Magnesium (as Magnesium L-Threonate) are equal. The form you choose determines how much Magnesium (as Magnesium L-Threonate) actually reaches your tissues, and the difference between the best and worst forms can be substantial. Magnesium L-threonate is unique among magnesium forms in its ability to cross the blood-brain barrier and raise cerebrospinal fluid magnesium levels. This makes it the only form specifically targeting brain health, while other forms primarily support peripheral magnesium status.

Forms of Magnesium (as Magnesium L-Threonate) Compared

Magnesium (as Magnesium L-Threonate) (T2 Specialist) has a bioavailability rating of good (S2). Typical dose range: not yet documented in our database.

What the Research Shows

Magnesium L-threonate (Magtein) is the only magnesium form clinically demonstrated to cross the blood-brain barrier and elevate brain magnesium levels. Research from MIT demonstrates significant improvements in synaptic density, learning, and memory. It is the preferred magnesium form specifically for cognitive and neurological applications.

How to Choose the Right Form

Multiple forms of Magnesium (as Magnesium L-Threonate) are available. Start by comparing formulary tiers — T1 Preferred forms reflect the strongest bioavailability evidence, and S1-rated forms deliver the most active compound per dose unit.

The appropriate form depends on your individual goals and your healthcare provider’s recommendations. Consult a qualified professional before selecting a supplement form.

Dosing & Safety

For Magnesium (as Magnesium L-Threonate), the typical dosing range is not yet documented in our database. Individual dose requirements vary based on health goals, body weight, and existing nutrient intake.

Side Effects: Specific side effect data for these forms is not yet documented in our database. In general, consult your healthcare provider regarding tolerability at higher doses.

These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting or changing a supplement regimen.

Dosing Guidance

Dosing information not yet available for this ingredient.

Frequently Asked Questions

What is the best form of Magnesium (as Magnesium L-Threonate)?
Multiple forms of Magnesium (as Magnesium L-Threonate) are available, each with different absorption characteristics. Our formulary classification data for Magnesium (as Magnesium L-Threonate) is being compiled. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
How much Magnesium (as Magnesium L-Threonate) should I take daily?
Dosing information for Magnesium (as Magnesium L-Threonate) is being compiled in our database. Individual dose requirements vary based on health goals and existing nutrient intake. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What are the benefits of Magnesium (as Magnesium L-Threonate)?
Magnesium (as Magnesium L-Threonate) has been studied for its role in supporting: Supports cognitive function and brain magnesium levels, Supports memory and learning via synaptic density, Supports healthy sleep quality, Supports neurological health and neuroprotection. Magnesium L-threonate (Magtein) is the only magnesium form clinically demonstrated to cross the blood-brain barrier and elevate brain magnesium levels. Research from MIT demonstrates significant improvements in synaptic density, learning, and memory. It is the preferred magnesium form specifically for cognitive and neurological applications. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
When is the best time to take Magnesium (as Magnesium L-Threonate)?
Optimal timing for Magnesium (as Magnesium L-Threonate) supplementation depends on the specific form, dosage, and individual factors. Some forms may be better absorbed with food; others may not require food. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
Are there side effects of taking Magnesium (as Magnesium L-Threonate)?
Tolerability of this Mineral supplement varies by individual, dose, and specific form. Some individuals may experience gastrointestinal discomfort at higher doses. Specific side effect profiles for each form of Magnesium (as Magnesium L-Threonate) are documented in our formulary where available. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What forms of Magnesium (as Magnesium L-Threonate) are available?
There are 1 form of Magnesium (as Magnesium L-Threonate) in our formulary: Magnesium (as Magnesium L-Threonate) (T2 Specialist, bioavailability: good (S2)). Forms differ in chemical structure, bioavailability, and typical dose range. FormulaForge classifies forms by tier based on published bioavailability evidence.

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FormulaForge formulates and sells supplements containing the ingredients discussed on this page. Our formulary recommendations are based on peer-reviewed bioavailability research. All cited studies are independently verifiable.